In an interview with Entertainment Weekly Samuel L Jackson mentioned the following..

She’s pretty much the strongest character — in terms of someone with powers are able to do things — in the Marvel universe. So, for Carol Danvers to be that person and for Brie to become that person, it’s gonna be a dynamite thing. I mean, [the Avengers] are up against some really, really tough odds right now — we saw throughout Infinity War — so now we know that we need something that’s as powerful as Thanos. And at some point, we’ll find out how powerful she is and all the things that she’s capable of. She’s one of the few people in the Marvel universe that can time travel, so…

Hold the bus!.. what was that last bit?

Not sure if this is just some smokescreen sent out by Marvel ahead of both Captain Marvel and Avengers: Endgame, but interesting all the same.

We will find out soon enough. Captain Marvel is out in the UK on 8th March and Endgame follows on the 26th April.